相对论平均场理论关于赝自旋对称性的研究(英文)

Research on the pseudospin symmetry in the relativistic mean field

相对论平均场理论被应用于检查208Pb的赝自旋对称性.通过相对论平均场计算提取的赝自旋伙伴态的波函数劈裂,研究不同介子场和光子场对赝自旋对称性的影响.结果表明:赝自旋波函数劈裂随着σ介子场强度的增加而增大,随着ω介子场强度的增加而减小.相比于σ和ω介子场,ρ介子场和光子场仅对赝自旋劈裂起着微弱的影响,σ和ω介子场对赝自旋对称性起主导作用,赝自旋劈裂主要来源于σ和ω介子场的竞争.

The relativistic mean field theory is adopted to check the pseudospin symmetry for 208Pb. Influences from different fields of mesons and photon on the pseudospin symmetry are investigated, and the splitting of wavefunction between the pseudospin doublets is extracted from the relativistic mean field calculations. It is shown that the splitting of wavefunction increases with increasing σ- field strength, and decreases with increasing to -field strength. In comparison with the σ- and ω fields, the ρ and photon fields produce more minor influence on the pseudospin splitting. It indicates that the σ and ω fields are dominant in influencing the pseudospin symmetry, and the pseudospin splitting comes from the competition of the σ and ωfields.